Roll for beating engines and the like



Dec. 22, 1931. F. s. FEELEY ROLL FOR BEATING ENGINES AND THE LIKE Filed March 21. 1930 2 Sheets-Sheet M, INVEEISJR IQ T ATTQ P. N EYS Dec. 22, 1931. F. G. FEELEY 1,837,768

ROLL FOR BEAT ING ENGINES AND THE LIKE Filed March 21, 1930 2 Sheets-Sheet 2 INVENTOR ATTORNEYS 7 bars, spaced from each other by wooden Patented Dec. 22, 1931 iiTEo: "STATE s:

FRANK G. FEELEY, E. PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO JONES & SONS 60., DE PITTSFIELD, MASSACHUSETTS, AECORCPORATION OF MASSACHUSETTS 1 ROLL FOR BEATING ENGINES AN THE LIKE Application filed March 21; 1930; Serial No. 437,641.

This invention relates to certain improvements in means forsecuringgrinding bars in a 7 position on the supports therefor in heating or. refining engines used inthe manufacture of paper stock.

In thisrclass ofrefining or beating engines there is provided a rotary support in which are arranged metal bars, known as grinding wedges, these bars cooperating with a bed plate in the case of beating: engines, or with a shell in the case of Jordan engines forefiiectmg the grinding of the pulp'which forms the paper stock.

In one way of constructing agrinding roll, the grinding bars are set in slots whichare cut or otherwise formed in spaced'heads or spiders which are mounted on a-driven shaft,

enlarged scale, of the construction shown at andthese bars are held in place by bands at each end of the roll thus formed, the bands 1 being shrunk'into slots formed in each end of they bars, the space between the bars being ing the bar as being placed in position;

filled with wooden wedges driven into place.

This method of construction has certain disadvantages,in thatin driving the woodenwedges into place and after the wedges have I become water soaked and swelled to some ex-- tent there is a tendency for the grinding bars to lift up in the central part of the roll. This springs the bars so that the surface of the roll is somewhat convex, and there is also a severe strain thrown on the shrink-bands at each end, and frequently these bands break,

thus letting the bars fly out, and alsothe pro- 4 ,ing the bar as being set in place.

jections or lugs on the-ends of the bars over which the end bands. are securedarediable '1 v chine selected to illustrate the invention is tor holding the grindingabars inIplace in.

grinding rolls of the character referred to in which the strain on the bars andon the parts by which the bars areheld' in place is relieved,

so that the springing of the barsin the central or other parts of the rollis prevented.

A further object of theinventionis to pro? vide a simple constructionwherebyv a bar or bars may be removed frointhe roll without.

disturbing or loosening the remaining bars, so that damaged or 111] ured bars may be easily.

-diiferent construction previous figures In the particular however, referring and quickly replaced as necessity may require.

With these and other'objects not specifieally referred to, the 'invention consists in certain'novel parts, arrangements and combinations which will be described in connection arrangement of assembling the bars with the roll and a modification ofthis method "which niay be used if desired.

. In the construction shown,-

igure 1 is a longitudinal sectional view, partly broken away, of a grinding-roll embodying the invention; 7

Figure 2 51s a detail sectional *view, on an the right hand end of Figure 1, the bar being shown in position;

- Figure 3 is a view similar to Figure 2 show- Figure 4 isa sectional view, on an enlarged scale, taken on the line 4-4 of Figure 2; Figure 5' is a longitudinal sectional view, partly brokenaway, of a grinding roll of a from that shown in'the .F'gure 6 is a detail sectional view, on an enlarged scale, of part of the construction shown at the right end ofFigure 5 showing the bar and shrink-band in position, and

' Figure 7 is a view similar to Figure 6 show- Referring now to these drawings, the] matures of theinvention the grinding barsmay be mounted or secured in rolls of othrt'ypes. construction illustrated, first to Figures 5 to 7, there is shown a grinding roIlmade up of aseries of heads or spiders, four such 'heads or spiders being illustrated, the end spiders are marked 1, 2 'and the central spiders are indicated by the numerals 3,4,these sp1ders into holding being conveniently being secured on a shaft 5, which may be rotated in any suitable manner, not illustrated. Mounted in these spiders or heads are grinding bars, one of which is shown marked 6', and in the construction shown in these figuresthese grinding bars are secured to the end spiders or heads by means of bands 7,

8, secured in place in any suitable manner,

as by shrinking them into position. i

In accordance with the invention, an 1 mproved arrangement is provided for holding the grinding bars in place where end rings or bands are used, so that the strain is taken off the bars and the rings, and thegdisadvantages above referred to are obviated. While the particular construction may be somewhat varied, in the construction shown the spiders are provided or formed with longitudinal slots, indicated at 10, and one face of the rim of the two central spiders 3, 4 1s formed with transverse slots or recesses,

marked 11. The grindingbars are machined to substantially fill the longitudinal recesses 10, and each grinding bar is provided, as

:- shown in Figure 4, with a projection extending on each side of the bar, such projections formed 12 through a suitable aperture formed in the bottom of the bar.

Each bar is also provided, at the roll ends, with a slot or recess 13 opening out of the ends of the bar, these slots being capacitated to receive the end rings 7, 8. In assembling the grinding roll, as shown in Figures 5 to 7, the bars are dropped. into the longitudinal slots 10, formed in the spiders, and are then moved sideways or laterally so that the pins 12engage the transverse slots 11 in the spider rims. The bars are thus locked in the heads on each side, the" pins taking up the strains or stresses developed by the centrifugal action of the grinding roll as it is rotated, thus relieving the strain on the bars and on the end rings. It will be observed that the two outer spiders or heads are recessed, as indicated at 1.4, to receive the bands 7, 8, which are shrunk position in these recesses. Interposed between the" knives are ar ranged the customary wooden wedges, which fill the space between the bars and prevent part of the roll, bars laterally and prevent any vibrations being set up. In order to f acilitate the placing of these wedges 1n position, they are in the form of two layers, that is, the lower layer is made up of three sections, as shown in Figure 5 marked 15.

which are driven separately and preferably slightlybelow the bottom of'the grinding bars, as indicated at'22 in Figure 2, that portion' of the woodfbelow the bottom of the bars swelling and of the filling. Above the short wedges 22 is a long wedge, marked 15", which extends the length of the roll and is held in place by is shown in Figures 1 to 4.

by driving a pin 7 preventing working out" screws 15. If desired, screw-bolts, indicated at 16 in the end heads, may be employed for further securing the wedges in place, these screws being tapped into the end heads. With this construction the bars are securely held in place in the grinding rolls and the strain on the bars and the end rings is reduced, so that danger of breaking the bars is eliminated and the roll retains its correct shape; Furthermore, by providing the projections extending on each side of the bar, such bar is very securely anchored in place and'the strain on the bar is lessened.

Under somecircumstances it may be desirable to omit the end rings 7, 8, before described, and provide in place thereof means by which the bars are held in all the heads by the holding projections, a single retaining from the roll without disturbing the reand such a construction Referring now to these figures, the bar is shown as made of? four heads or spiders 18, which are formed mainder of the bars,

' with longitudinal notches for the reception of the bars, and each of which is provided with a transverse notch 19 to receive the pins or other projections 12 on the bars, each bar in this construction being provided with four of these pins to engage the four heads, instead of the two pins shown in the construction of Figures 5 to 7. In assembling a roll with this construction, the bars are dropped into the longitudinal slots and moved side ways or laterally toward the left of Figure 1, thus causing the pins 12 to engage the notches 19. Endwise movement of the bar to the left is prevented by the head or spider at the left hand end of the roll, and sidewise movement in the other direction is revented b means of the roll by means of suitable screws 21.

Wooden sectional wedges 22 are provided in this arrangement similar to the wedges 15 heretofore referred to in connection with the construction of Figures 5 to 7.

With this construction, by removing the holding ring 20, any bar or bars may be removed from the roll without disturbing the remainder of the barssimply by pulling them sidewise'out of the roll, that is, to the right, as shown in Figures 1 to 3. While the invention has been shown and described in its preferred embodiments, it will be understood that certain changes and variations may be made in .the specific construction disclosed without departing from the invention as defined in the appended claims.

" What I claim is: i

1. In a roll for beating engines and the provided with longitudinal slots, transverse recesses in certain parts of the support, grinding bars seated in the'longitudinal slots and having projections extending on each side of the bar associated therewith soas to form a part of the bar and seated in the transverse recesses, and means for preventing endwise movement of the bars.

2. In a roll for beating engines and the like, the combination of a rotary support provided with longitudinal slots, transverse recesses in certain parts of the support, grinding bars seated in the longitudinal slots, pins associated with the barsso as to form a part of the bars and extending over each side thereof and seated in the transverse recesses, and means for preventing endwise movement of the bars.

3. In a roll for beating engines and the like, the combination of a rotary support formed of a plurality of spaced heads or spiders, a shaft on which these are mounted, longitudinal slots in the spiders, a transverse recess in certain of the spiders intermediate the end spiders, grinding bars seated in the longitudinal slots and having projections extending on each side of the bar associated therewith so as to form a part of the bar seated in the transverse recesses, and end rings engaging the bars and secured over the ends of the bars in the outer spiders.

4. In a roll for beating engines and the like, the combination of a rotary support formed of a plurality of spaced heads or spiders, a shaft on which these are mounted, longitudinal slots in the spiders, a transverse recess in the spiders intermediate the end spiders, grinding bars seated in the longitudinal slots, pins associated with the bars so as to form a part thereof extending on each side thereof and seated in the transverse recesses, and end rings engaging the bars and secured over the ends of the bars in the outer heads.

5. A grinding bar or knife for beating and the like paper making machines having holding projections extending on opposite sides of the bar and associated therewith so as to form a part of the bar.

6. A grinding bar or knife for beating and the like paper making machines having holding pins extending on each side of the bar and driven into the bar so as to form a part thereof.

7. In a roll for beating engines and the like,

the combination of a rotary support provided with longitudinal slots, transverse recesses in certain parts of the support, grinding bars seated in the longitudinal slots and having projections extending on each side of the bar associated therewith so as to form a part of the bar and seated in the transverse recesses, means for preventing endwise movement of the bars in one direction, and a removable end ring for preventing endwise movement of the bars in the opposite direction.

8. In a roll for beating engines and the like, the combination of a rotary support formed of a plurality of spaced heads or spiders and a shaft on which these spiders are mounted, longitudinal slots in the spiders, a transverse recess in certain of the spiders intermediate the end spiders, grinding bars seated in the longitudinal slots and having projections extending on each side of the bar associated therewith so as to form a part of the bar seated in the transverse recesses, a removable end ring secured over the ends of the bar at one side, and wedges between the bars and extending between and over the outer peripheries of the spiders.

In testimony whereof, I have hereunto set my hand.

FRANK G. FEELEY. 

